Artillery computer



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6 Claims. (Cl. 23S-61.5)

2 This invention relates to apparatusi-for the mal timeoi f iightvof theprojectile to produce a control of artillery rire and particularly toelecthird set of voltages varying in magnitude with tromechanioalartillery computers. the normal predicted changes in the coordinates Theobject or" the invention is an apparatus for of the target, and is alsofractionated proporthe production of physical quantitiesproportiontionally to the air density, muzzle velocity and al to thepredicted changes in the coordinates of temperature to produce a fourthset of voltages. the position of a target during the time of flight Thefourth set of voltages is algebraically addof a projectile. ed to thethird set of voltages to produce a set A feature of the invention is theprovision of of voltages more accurately proportional to the means formodifying the predicted changes, as 10 predicted changes in thecoordinates of the pobased on the time of flight of the projectile, tosition of the target during the time of flight of account for theinteraction on the time or" flight the projectile.

of ballistic effects due to non-standard density In the drawings:

of the air, muzzle velocity of the gun and tem- Fig. l schematicallyshows a system for transperature. l5 mitting data from the observingstations to the In prior electromechanical computers, the obcomputer;

servations of the target controlled the genera- Fig. 2 schematicallyshows a system for gention of physical quantities varying in magnitudeerating voltages proportional to the coordinates with the coordinates ofthe position of the tarof the present position of the target;

get. From these physical quantities, other Dhr- Fig. 3 schematicallyshows a system for syn- SCal quantities Were derived, Varying nmagnithetically generating voltages proportional to tude with the ratesof change in the ooordithe coordinates of the present position of thenates of the position of the target. The magtarget, or voltagesproportional to the rates of nitudes of the latter quantities were thenmodichange in said coordinates;

fied in accordance with the time of flight of the Fig. 4 schematicallyshows a system for indi- DlOjeC'ilB aS given in the firing tables OI thecating the present position of the target with gun and projectile, toproduce quantities varyrespect to the gun, for generating voltagesproing in magnitude With the predicted Changes in poitional to the ratesof change in the coordithe coordinates during the time 0f ght Of thenates, and voltages proportional to the coordiprojectile. nates of thepredicted position of the target;

In accordance with the present invention, the "o Fig. 5 schematicallyshows a system for indiphySCal quantities, Varying in magnitude witheating the azimuths and quadrant elevations of the rates of change inthe coordinates of the two guns, generating a voltage proportional t0position of the target, are modified in acCOrdthe range of the secondgun, and generating ance with the normal time of night of theprojecvoltages proportional to the maximum effects of tile as given inthe firing tables for the gun and "o the wind; projectile, and fromthese quantities, 6 schematically Shows avsystem for indiotherquantities are derived varying in' magnitude eating the deflection angleof a flrst gun, for with the effec@ on the u me of lght Oflnongenerating voltages proportional to the range of standard density of theair, muzzle velocity of 40 the mst gun, and for indicating the ballisticthe gun and temperature. These other quanelevation angle of a secondgun; tities are algebraically added to the modied Figs' 7 and 8schematically show a System for quantities t0 produce quantities moreaccurate' indicating the ballistic elevation angle of a rst lyproportional to the predicted changes in the gun;

In a SlleClflC embodlment 0f the mventlfm the ,geometric relationshipsbetween the observation observations of the target control thegeneration Stal-,1011s, target and guns; of a first set of voltagesvarying in magnitude Flg. ll schematically Shows a Summing ampli- "i"with the rectangular coordinates of the present er used ln Flgsl to 8;

" DOStiOn '0f the target. FTOm this TS Sel? 0f 50 Fig. l2 schematicallyshows a control circuit voltages are derived a second set of voltagesused in Figs. 4, 5, 6, 8;

varying in magnitude with the rates of Change Figs. 13A to 13Hschematically show a numoi the first set of voltages for maximum time ofber of potentiometer networks; flight of the projectile. This second setof volt- Figs. 14 to 18 show curves related to the netages isfractionated proportionally to the norworks of Fig. 13;

